The Obvious Truth About Human Fuel

1. We Run on Glucose

1. Every cell in your body can use glucose for energy.

2. Your brain especially, it consumes ~20% of your daily calories and almost exclusively uses glucose (except in starvation/ketosis).

3. Muscles, red blood cells, nerves, all of them default to glucose.

4. Carbs break down fast and clean: starches → glucose, sugars → glucose/fructose.

Biochemically, we are designed to be glucose engines.

2. Protein Is Already in Plants

1. The myth is that protein is scarce in plants. But every plant cell contains protein.

2. Vegetables, fruits, grains, legumes, nuts, and seeds all supply amino acids. Even a potato is ~10% protein by calories.

3. Our bodies don’t need “meat protein”, we need amino acids, and plants provide them.

4. The big animals people admire (elephants, gorillas, horses, cows) get their protein entirely from plants.

3. Fats Are There Too

1. Whole plants naturally carry fats, avocados, nuts, seeds, olives, even small amounts in greens.

2. Humans don’t need massive fat intake; we need essential fatty acids, and plants provide them in balance.

4. So Why Isn’t It Obvious?

1. Culture & Industry: For decades, advertising and government guidelines pushed high-protein diets, especially animal protein, as strength-building and essential. Meat and dairy industries have huge lobbying power.

2. Survival Bias: In harsher climates or lean seasons, humans leaned on animal fat and protein as fallback fuel. That history gets mythologized as the “natural” way to eat.

3. Addiction & Palate: Highly processed foods hijack our senses. Protein- and fat-heavy foods (cheese, meat, fried oils) stimulate dopamine, making them feel more “necessary” than plants.

4. Confusion About Carbs: People lump refined sugar and white flour (which do cause health issues) together with fruit and whole grains, giving “carbs” a bad reputation.

5. The Reality

Strip away marketing, survival myths, and diet fads, and it’s clear:

1. We are carbohydrate machines.

2. The protein and fats we need are abundantly available in vegetables, fruits, legumes, nuts, and seeds.

3. What makes people sick isn’t “too many carbs,” but too many processed carbs, excess fats, and too little fiber-rich whole plant food.

So, the reason it’s not “obvious” is less about biology and more about cultural conditioning, industry influence, and confusion between whole foods and processed junk.